On the characteristic distance and minimum fracture toughness for cleavage fracture in a C-Mn steel
Source abstract
Abstract
This study makes a further investigation on the characteristic distance, minimum fracture toughness and its temperature dependence for cleavage fracture in a C-Mn steel by the detailed finite element analysis combined with experimental observation and measurement. Results show that there is a minimum active zone for cleavage initiation, and the minimum fracture toughness of steel results from the minimum active zone necessary. Corresponding to the minimum fracture toughness, the cleavage fracture ahead of a crack tip can only initiate in a distance range from the minimum distance Xfmin determined by the lower boundary of the active zone to the maximum distance Xfmax determined by its upper boundary. The reason for the occurrence of the minimum active zone and the factors influencing it are analyzed. The temperature dependence of the characteristic distance and minimum fracture toughness and its mechanism are also discussed.
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Research context
OpenAlex topics: Fatigue and fracture mechanics · Non-Destructive Testing Techniques · Welding Techniques and Residual Stresses
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References (24)
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